Yes, Yuuki, who Asaka is today is largely credited to you. The girl who was once a crybaby constantly getting dragged around by you is now able to take strides on her own. But there are still things she's learning from Yuuki every day just by spending time with her. I've said it before but Asaka's bluntness comes from Yuuki, who wears her heart on her sleeve. I feel that everything Yuuki gave Asaka in their childhood, Asaka is now returning. Whenever Yuuki gets in her own head, Asaka seems to always know what to say or do that leads to Yuuki learning something new about herself and/or Asaka.
Of course Asaka put in the effort to improve herself as well, and that's what it's all about. A partner is someone who should push you to be better. Yuuki's inquisitive, boisterous nature expanded Asaka's worldview, and Asaka's grounded honesty keeps pulling Yuuki back to earth when she drifts too far into herself. It's a mutual give and take that's been building since they were kids, and it keeps deepening the longer they stay side by side.
Thanks for the translation!